"Hell" or, "The End of the 2ww"

I've been getting mixed signals from my body. For the past few days, I've been feeling super warm, especially at night, like radiating heat. I'm having trouble sleeping/staying asleep. Last night, for instance, I woke up every hour/hour and a half, and each time, I had to pee. I've been feeling achy. I've had headaches. My lower back aches, and I feel kind of crampy (not painful, but more along the lines of a dull ache). I'm exhausted, and yet, I don't sleep well at night. I'm bloated, and for the last few days, I've been waking up with a stuffy nose that goes away as soon as I am no longer horizontal. I was nauseous on Monday, again this morning, and overall I feel weird in the mornings...but maybe that's because I'm not sleeping well. I took a nap the other day (before I was having trouble sleeping), which I never do. And today: brown cervical mucus. Implantation bleeding? Maybe, but let's face facts, probably not.

I HATE this last part of the two week wait!! Is it my period, or am I finally pregnant?? Who knows. I don't. Do you??

I've read that many women feel like they're coming down with the flu when in actuality, they're pregnant. Is that what's going on with me? Today is CD 26/12 DPO. I feel like it's 1) too early for my period to start since my cycles are usually 30-32 days long, but 2) too late for implantation bleeding, even though I've read that it can occur anywhere from 8-12dpo. I ovulated on CD 14 or 15 this month due to the HCG shot so does that mean I'm going to have a 28/29 day cycle this month? Does ovulation always occur right smack dab in the middle of your cycle?

I'm really starting to think this cycle is yet another bust. I just don't have a good feeling about it right now, at all. That brown mucus really threw a big fat wrench into the mix, because I honestly think my period is on its way. Which makes me want to hurl and/or punch a whole in the wall and/or cry my eyes out. When I first saw it, I was confused, and then a bit encouraged, and then...upset. Because I just don't think it's what I want. Not at CD 26, and not when I'm having some cramping.
                                                                     
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In other news, I started a temp job yesterday. Great, yes, but also, not so great in that it's going to severely hamper my ability to go in whenever I need to for my fertility treatments. If this cycle doesn't take (God forbid...) and we need to do another IUI, how will I make my appointments? I'm a temp, I have no work history with the company so they don't really know me from Adam, nor do I have time accrued to take off. I called our clinic today and found out that they do all ultrasounds at 8am, and IUI's at 9am (sperm samples are dropped off at 7:30am). For example, if my CD 12 ultrasound is at 8am on a Wednesday, and I need an IUI that Friday, how the eff am I going to get that time off?? Two doctor's appointments in one week? And, you don't know when your IUI is going to be until the ultrasound so it's not like I can tell the boss ahead of time. I was lying awake last night worrying about all of this. Why is this just all so complicated and hard? What am I going to do?